Figure 8. 21 shows a comparison of two hooks having different shapes . 图821所示为两种不同形状吊钩的对比。
Exactly . so if you two hook up , 对头.所以如果你们俩在一起了,
Figure 8 . 21 shows a comparison of two hooks having different shapes 图8 21所示为两种不同形状吊钩的对比。
If the projection screen has to be installed on the ceiling , two hooks must first be installed on the proper place of the ceiling 如果投影屏幕需要安装于天花,两个挂钩先需要安装于天花的适当位置。